Assembly is Impossible : can not achieve the project objective.- Safety risk for the customer- Can not meet the design requirement- Operation is not feasible - Safety/ergonomics critical risk for operators (against rules)- Critical impact on the project Return Of Investment""Assembly is Highly Impacted : extra cost or capex will be necessary vs the budget- Operation difficulty cause additional assembly time or investment- Risk of damage, mix or wrong operation cause additionnal controls or repairs""Assembly Can Be Further Optimized : opportunity to further optimize cost or capex vs the budget.- design opportunity for ease of assembly or simplification"